['HTMLmirror',     'yesno',            'No'],

sub parse_yesno {
my($var, $value) = @_;
$_ = $value;
if (m/^y/i || m/^t/i || m/^1/ || m/^on/i) {
  return 1;
}
elsif (m/^n/i || m/^f/i || m/^0/ || m/^of/i) {
  return 0;
}
else {
  config_error("Use 'yes' or 'no' for the $var directive\n");
}
}